Pneumatic cushion



April 30, 1940. N. FISHER PNEUMATIC CUSHION Filed Feb. 24, 1959 Inventor Norm a v V v I Q and A iiorngys Patented Apr. 36, 1940 2,199,047

UNITED STATES PATENT OFFICE PNEUMATIC CUSHION Norman Fisher, Eagle Grove, Iowa Application February 24, 1939, Serial No. 258,337

I 4 Claims. (01.. 155-179) This invention relates to pneumatic cushions as at H, to separate the tubes 1 and 8 from for seats such as employed on farming impleeach other and the portions l and II of the ments for the purpose of absorbing shocks and tube 8 from each other. jars as well as providing a comfortable rest and The tube 1 being of the shape shown in Fig- 5 may be employed in boats and if need should ure 5 will readily conform to the contour of the ,5 occur may be utilized as a life preserver. The upturned walls of a farm implement seat while primary object of this invention is the provithe tube fl rests flatly on the seat portion of the sion of a device of the above stated character Seat and by varying the amount of air pressure which may be readily adjusted to fit seats of in the different tubes the cushion will readily diiierent sizes and shapes and may have its conform to the seat of the farm imp e a 10 cushioning qualities increased and decreased by also by varying the air pressure the cushioning increasing and decreasing'the air pressure in the qua es o t e Cushion y he Variedinflatable tubes thereof and may be readily The covering 6 is provided with slots l8 in opchanged from one seat to another. posite walls thereof to permit the tubes 1 and 8 With these and other objects in view, the into be inserted in the prope partments of the 15 vention consists in certain novel features of concovering which a formed y the Stitching 0f struction, combination and arrangement of parts opposite walls of the covering together, as shown to be hereinafter more fully described and at ll. The slots l8 permit the inflating Valves to claimed. extend outwardly of the covering and the latter For a complete understanding of my invenalong the slots l8 are provided with eyelets I9 20 tion, reference isto be had to the following dethrough w c laeings 20. y he passed for scription and accompanying drawing, in which ing the slots of the covering about the inflating Figure 1 is a top plan view illustrating a cushvalvesion constructedin accordance with my invention. Attaching Straps 2| a Secured t the V Figure 2 is a sectional view taken on the line ing, one of which is equipped with a buckle 22 25 2-2 of Figure 1. to engage with eyelets 23 provided in the other Figure 3 is an elevational view illustrating the strap w er y the Cushion y be di y front edge of the cushion. strapped onto a seat of a farmingimplement or Figure 4 is an elevational view illustrating the similar device. Any number of straps and rear edge of the cushion. buckles may be provided on the device to suit 30 Figure 5 is a plan view illustrating the inflatthe different kinds of seats on which the device able tubes. may be adapted.

Referring in detail to the drawing, the cushion It is preferable that the inner curved edge of is indicated in entirety by the character 5 and the inflating tube I taper to a knife edge while consists of an outer covering 6 constructed of the outer edge is rounded in cross section to perany material suitable for the purpose capable of mit the tube 1 to more readily conform to the withstanding severe wear and strain. Arranged upstanding walls of a farm implement seat. in the covering 6 are inflatable pneumatic tubes It is believed that the foregoing description, I and 8. The inner tube 1 is arcuately curved when taken in connection with the drawing will 40 or substantially U-shaped having the inflating fully set forth the construction and advantages 40 valve 9 located intermediate its ends. The inof this invention to those skilled in the art to flatable tube 8 is of a shape arranged to fit withwhich such device relates, so that further detailed in the tube 1 and includes portions l0 and II description will not be required. joined by a portion l2. The portions. land I l What I claim is: have arcuately-curved edges to conform to the. 1. A pneumatic cushion comprising inner and co tcu of the inflatable tube 1 a d s so Droouter interfltting inflatable tubes one being of Vided W Straight Parallel d es. l3 and a substantially U shapev and the other being shaped St d l4 Which is in a pl n with the to fit within the former,- a covering for said tubes, ends I5 01'' t inflatable tube The a ht said covering having opposite walls thereof edge M has an inflating valve l6 connected stitched together between the tubes to separate 50 thereto positioning the inflating valve l6 directly the tubes from each other.

opposite the inflating valve 9. 2. A pneumatic cushion comprising inner and The inflatable tubes 1 and .8 are arranged in outer interfltting inflata le tubes one being of the outer covering and the latter has its opposubstantially U shape and the other being shaped 5 site walls stitched or otherwise secured together, to fit within the former, a covering for said tubes.

said covering having opposite walls stitched together between the tubes to separate the tubes from each other,-oppositely arranged inflating valves on said tubes, said covering hav-- ing slits to permit the inflating valves to extend outwardly thereof, and laclngs securing the slits outwardly thereoi', lacings securing the slits or the covering together about the inflating valves, and attaching straps including fastening means for attachmentto a seat.

4. A pneumatic cushion comprising a substantially U shaped inflatable tube, a second tube fitting within the substantially U shaped inflatable tube and including separable portions and a connecting portion between the separable portions, inflating valves for said tubes, and a covering encasing said tubes and having opposite walls thereof stitched together by the stitching passing between the tubes and the separable portion of the second-named tube.

NORMAN FISHER. 

